Question

For the equation $y=mx+b$, if y and x are proportionally related to each other, then

Answer 1

Detailed step-by-step solution:
● If $x$ and $y$ are proportionally related to each other, then its equation represents a straight line passing through the origin.
● The straight line is in the $y=mx+b$ form. As $y$ and $x$ are proportionally related to each other, it passes through origin $(0,0)$.
$\Rightarrow 0=m\left(0\right)+b$ (substituting $x=0,y=0$)
$\Rightarrow b=0$
Option B is correct.